CN210439278U

CN210439278U - Rubber water stop structure at top of impervious wall

Info

Publication number: CN210439278U
Application number: CN201921151144.1U
Authority: CN
Inventors: 万山红; 唐秋君
Original assignee: Sinohydro Bureau 5 Co Ltd
Current assignee: Sinohydro Bureau 5 Co Ltd
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2020-05-01
Anticipated expiration: 2029-07-22

Abstract

The utility model discloses a cut-off wall top rubber stagnant water structure specifically does: a rubber water stop (2) is vertically arranged in a slotted hole (3) of the impermeable concrete (4), and the rubber water stop (2) extends to the structural concrete (1) at the upper part; the slot (3) of the impermeable concrete (4) is sequentially provided with the following fillers: lower part micro-expansion mortar (7) of the lower layer, a water-swelling water stop bar (6) of the middle layer and upper part micro-expansion mortar (5) of the upper layer. The utility model discloses the stagnant water problem between impervious concrete (4) and the follow-up concreting structure concrete (1) of solution lower part that can be fine can avoid the mutual seepage between the impervious wall both sides, ensures the infiltration stability of both sides ground.

Description

Rubber water stop structure at top of impervious wall

Technical Field

The utility model relates to a basic seepage prevention structure field such as hydraulic and hydroelectric engineering, municipal works, traffic engineering, especially a cut-off wall top rubber stagnant water structure.

Background

The underground continuous wall is called as ground continuous wall for short, is a common means for foundation engineering treatment, mainly solves the problem of foundation seepage prevention and increases foundation strength. Common underground trenching construction equipment includes down-the-hole drilling, hydraulic washing, hydraulic grab buckets and the like.

According to different functions of design, the technical indexes of the poured concrete such as the type, the strength and the like are different, and plastic concrete and common concrete are commonly used. When the design purpose is mainly the anti-seepage function, the underground continuous wall is generally called as an anti-seepage wall, and the anti-seepage wall is divided into a plastic concrete anti-seepage wall with lower strength and a common concrete anti-seepage wall.

The method is characterized in that concrete with the height of 50cm is generally poured in the process of pouring concrete, then the impervious wall is dug out, the polluted concrete with the top of 50cm in the pouring process is chiseled, the fresh concrete is exposed, a better impervious measure needs to be arranged between the fresh concrete and the concrete poured on the ground in the subsequent site, and the mutual leakage of underground water between the two sides of the wall body is avoided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a cut-off wall top rubber stagnant water structure is provided, the problem of the mutual seepage of groundwater between the cut-off wall both sides is solved.

In order to solve the technical problem, the utility model discloses a technical scheme is:

a rubber waterstop structure on the top of an impervious wall is characterized in that a rubber waterstop is vertically arranged in a slotted hole of impervious concrete, and the rubber waterstop extends to structural concrete on the upper portion; the following fillers are sequentially arranged in the slotted hole of the impermeable concrete: the lower part of the lower layer is micro-expansion mortar, the water-swelling water stop bar of the middle layer is micro-expansion mortar on the upper part of the upper layer.

Compared with the prior art, the beneficial effects of the utility model are that: the problem of water stop between lower anti-seepage concrete and upper structure concrete poured subsequently is well solved, mutual leakage between two sides of the wall body can be avoided, and the seepage stability of foundations on two sides is ensured.

Drawings

FIG. 1 is a schematic view of the whole structure of the rubber water stop on the top of the diaphragm wall of the present invention;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

FIG. 3 is a schematic view of a flat back hoe excavating the top of the wet concrete;

FIG. 4 is a schematic diagram of a hydraulic splitter excavating a top of common concrete;

figure 5 is a schematic view of a concrete cutting machine cutting a slot.

In the figure: 1-structural concrete; 2-rubber waterstops; 3-a slot; 4-impermeable concrete; 5-upper micro-expansion mortar; 6-water swelling water stop strip; 7-lower micro-expansion mortar; 8-contaminated concrete; 9-a backhoe bucket; 10-steel plate with knife edge; 11-pre-drilled holes; 12-a hydraulic splitter; 13-excavating a surface; 14-wood board; 15-concrete cutter; 16-uneven surface; 17-cutting the seam;

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 and fig. 2, the rubber water stop structure at the top of the anti-seepage wall of the present invention specifically comprises: a rubber water stop 2 is vertically arranged in a slotted hole 3 of the impermeable concrete 4, and the rubber water stop 2 extends to the structural concrete 1 at the upper part; the following fillers are sequentially arranged in the slotted hole 3 of the impermeable concrete 4: lower part micro-expansion mortar 7 of the lower layer, water-swelling water stop 6 of the middle layer and upper part micro-expansion mortar 5 of the upper layer.

According to the example of the rubber water stopping structure on the top of the impervious wall, the rubber water stopping structure on the top of the impervious wall can be formed by adopting the following construction method:

firstly, cutting off the polluted concrete 8 on the top of the impermeable concrete 4 to expose fresh concrete;

for plastic concrete, because the strength is generally very low and the axial compressive strength is generally less than 5MPa, a steel plate 10 with a knife edge is welded at the bottom of a backhoe bucket 9, the backhoe with teeth is transformed into a flat bucket with a knife edge, and the top of the concrete 8 with pollution is directly excavated according to the designed elevation. For common concrete with higher strength, the top contaminated concrete 8 can be cut off by methods such as a diamond wire saw, a hydraulic splitter 12, a static breaker and the like.

Secondly, slotting the central line of the impermeable concrete 4 to form a slotted hole 3

For the plastic concrete with lower strength, because the surface dug out by a flat-end back shovel is very flat, two side lines of the grooved hole 3 can be directly scribed on the surface of the plastic concrete according to the width (generally 10cm) of the designed groove hole 3, and a concrete cutting machine vertically cuts a small groove with the depth of 16-20 cm and the width of 10cm along the design line.

For common concrete with higher strength, the rope saw method is adopted to cut off the polluted concrete 8 at the top, and as the cutting surface is very flat, the same method as the method can be adopted to open the groove; for the method of cutting the top contaminated concrete 8 with the hydraulic splitter 12 and the static breaker, because the surface after cutting is uneven, the surface needs to be leveled with the wood board 14 before the concrete cutter is used for grooving, and the concrete cutter can be ensured to keep stable when walking on the surface. Due to the increased thickness of the wood board 14, the cutting depth of the blade on the concrete cutting machine needs to be adjusted to meet the required grooving depth.

Thirdly, cleaning the slotted hole 3

Before the rubber water stop 2 is installed, waste residues in the slot hole 3 need to be cleaned. For common concrete, in order to be convenient to clean, a cutting seam can be added on the axis of the slotted hole 3, then a steel plate is inserted into the cutting seam, the steel plate is pried to two sides, and the concrete in the slotted hole 3 is broken by utilizing the characteristic of low breaking strength of the concrete. The waste slag in the slotted hole 3 can be cleaned by high-pressure water, so that no dirt and dust exist in the slotted hole 3.

Fourthly, temporarily positioning the rubber water stop 2

The rubber water stop 2 is placed into the slotted hole 3, and the bottom and two sides of the rubber water stop 2 are temporarily embedded and fixed by small stones or battens.

Fifthly, anchoring the bottom of the rubber water stop 2

And pouring the mixed micro-expansion mortar into the bottom of the rubber water stop 2 in the slotted hole 3, wherein the depth is about 5cm, after the micro-expansion mortar is initially set, taking out the small stone or the wood strip, and in-situ filling the micro-expansion mortar to form the lower micro-expansion mortar 7.

Sixthly, installing a water-swelling water stop strip 6

After the micro-expansion mortar 7 at the lower part is finally solidified, the water-swelling water stop bar 6 is embedded into the surfaces of the micro-expansion mortar at two sides of the rubber water stop band 2, and the width of the used water-swelling water stop bar 6 is not less than 5cm and the thickness is 2-3 cm.

Seventhly, filling micro-expansion mortar on the upper part in the slot hole 3

And (3) deeply pouring micro-expansion mortar into the residual slotted holes 3 until the top of the impermeable concrete 4 to form upper micro-expansion mortar 5. And cleaning the working surface, and performing subsequent construction of the structural concrete 1 at the upper part.

Claims

1. A rubber water stop structure at the top of an impervious wall is characterized in that a rubber water stop (2) is vertically arranged in a slotted hole (3) of impervious concrete (4), and the rubber water stop (2) extends to structural concrete (1) at the upper part; the slot (3) of the impermeable concrete (4) is sequentially provided with the following fillers: lower part micro-expansion mortar (7) of the lower layer, a water-swelling water stop bar (6) of the middle layer and upper part micro-expansion mortar (5) of the upper layer.